For a full documentation of the recent state of the Paippalāda editorial art see the introduction of Jeong-Soo Kim (Würzburg) to his Atharvaveda Word Index Project (with downloadable index):

Editions (Śaunaka):

Rudolph von Roth, W. D. Whitney, Atharva Veda Sanhita. Berlin 1856. 3rd ed. Bonn 1966.

Vishva Bandhu: Atharvaveda (Śaunaka) with the Pada-pāṭha and Sāyaṇācārya’s commentary. Edited and annotated with text-comparative data from original manuscripts and other Vedic works. 5 Vols. Hoshiarpur 1960-1964.

 

Translation (Śaunaka):

W. D. Whitney: Atharva-Veda Saṃhitā. Translated with a critical and exegetical Commentary. Revised and ... ed. by Charles Rockwell Lanman. 2 vols. Cambridge / Mass. 1905.


Regards,
WS